I'm using an RTL-SDR to receive Es'Hail 2. My chain is as follows in order:
- 60 cm TV Satellite dish pointing 2 degrees off Es'Hail 2
- Universal LNB (from TV company, not really a stable frequency). This LNB downconverts the satellite to the 739Mhz band.
- Long RG6 coax run (involving a serious amount of adapters and sockets in order to feed to the correct room in my house). The run is about 20-25m
- RTL-SDR bias-t module
- RTL-SDR AM filter module
- NESDR Smart RTL-SDL (inside metal case)
- Raspberry Pi (running rtl_tcp)
- Windows laptop running SDR#
As long as I use SDR#'s audio noise filtering DSP, reception isn't too bad as long as the people transmitting are using a good amount of power. Weaker stations are quite hard to hear. Due to the unstable LNB, I have to keep re-tuning, but that's ok for now.
At this stage, installing a new, or re-aligning my satellite dish isn't an option.
I would appreciate any help on any tips in order to improve this reception. The RTL-SDR has quite a high noise floor compared to the satellite signal. FWIW, the noise doesn't drop much even with the antenna removed, indicated that the noise is internal to the device.
My current train of thought is to add a LNA somewhere, but I'm not sure where. Given my LNB requires a 12v bias-t, I'm unsure i'd be able to install an LNA close to the dish, without have to move the bias-t injector even closer as well.